My navigation DVD has become unusable due to some scratches and will not burn. I called the dealership for a replacement and was told a new one will cost $250.00. No thanks. Anyone have any contacts to get this for what it's really worth, $25.00? NAVTEQ for GM. 2006 Buick Rendezvous. Oh, I tried to buff out the scratches with no luck. And I tried to remove the files and re image them on a new DVD with no luck. taking suggestions......